fs
const fs = require('fs');
const data = fs.readFileSync('conf.js');//阻塞操作
console.log(data)
fs.readFile('./conf.js', (err, data) => {? //異步操作
? ? console.log(data)
});
//Promise
const { promisify } = require('util');
const readFile = promisify(fs.readFile);
readFile('./conf.js').then(data => console.log(data))
//實(shí)驗(yàn)警告
const { promises } = require('fs');
promises.readFile('./conf.js').then(data => console.log(data))
流
const fs = require('fs');
const rs= fs.createReadStream('./conf.js') // 讀取流
const ws = fs.createWriteStream('./conf2.js') // 寫入流
rs.pipe(ws);會重新創(chuàng)建一個(gè)js 復(fù)制
buffer?
const buf1 = Buffer.alloc(10);
console.log(buf1)
const buf2 = Buffer.from([1,2,3])
console.log(buf2)
//寫入
buf1.write('hello')
console.log(buf1)
//讀取
console.log(buf1.toString())
const buf4 = Buffer.concat([buf1,buf2])
console.log(buf4.toString())
